Lock-nut.



No. 830,956. PATENTBD SEPT. 11, 1906. P. E. BAGGE. I LOCK NUT.

APPLICATION FILED JAN. 19, 1906.

"UNITED STATES PATENT ()FFIGE;

Specifieation of Letters Patent. Application filed January 19. 1906. ,sma in. 296,862.

Patented Sept. 1 LJLQOGQ TodZ'Z whom it may concern:

Be it known that I, PETER E. BAGGE, a citizen of the United States, residing at Moline, in the county of Rock Island and State of Illinois, have invented certain new and useful Improvements in Lock-Nuts, of which the following is a specification, referenceben ing had therein to the accompanying drawings.

My invention relates to that class of locknuts in which for the purpose of securing a rigid or tight engagement of the nut with the screw the former is distorted, causing such three times as A tions of the nut.

. represented in Fig. 3, one of the binding of the screw-threads of the nut and the screw as to prevent the accidental or unintentional movement of one relative to the other.

5 b, united by pillars 0.. l)

. view of the same parts, the nut Fig. 4

In the accompanying drawings, Figure 1 is i a side view of a lock-nut embodying my invention applied to a screw. Fig. 2 is a side being turned one-quarter around as compared with the position represented in Fig. 1. Fi 3 is a View of the same nut when distorte to cause a locking engagement thereof with the Screw,

is alongitudinal sectional view of the, nut. Figs. 5, 6, and 7 are perspective views illustrating several steps in the making of a nut embodying my invention.

In the accompan g drawings, a designates a screw-three ed bolt ada ted to have applied to it a lock-nut of the character embodying my invention. It may be of usual construction in all rti'cul'ars.

The nut which have invented is considerably longer than the nuts in common use,

preferably about two or three times as long;

and it consists of two screw-threaded parts 7; is sirnilar in constructionto an ordinar nut, being internally screw-threaded, as indicated. The pillars or arts 0, that connect the two nut portions b g, are preferably arranged diametrically opposite each other and are separated by the open, spaces 6 e. The

mner faces or walls of the pillars'c are formed with screwthreads f, the'pitch correspond,-

ing with the pitch of the threads i'n'the parts. 7) b, and arranged to engage with the threads r of the bolt a.

In Figs. 5, 6, and 7 I have'illustrated. the steps employed in the manufacture of a nut such as I have described. In F ig. 5 is repre sented the blank from which the nutis formed. Itinno wise differs from an ordinary nut-bla'nk, except for its greater length,

register with the threa s of the bolt.

controlled by the bolt. 1

take place a,

Each 'of the parts as already stated, two or long as the ordinary nut. In Fig. 6 the nut-blank is represented as having been cut away on either side at e e to form the connecting-pillars between the end por The blank thus formed is then screw-threaded, forming the complete nut represented in Fig. 7, which maybe apv plied to a screw-bolt the same as may an ordinary nut. In order to transform the nut shown in Fig. 7 to a locking-nut like that end parts Igor b of the nut is turned relative to the other part, with the result that the connectingillars c are twisted or distorted and the pitc of the screw threads on the inner faces of the pillars are so changed that the will not accurately This. lace between those of the being preferably,

causes a binding action to'take the threads 0 the pillarsan bolt.

, .The locking efficiency of the nut may be extent to which the nut is istorted, a slight turning of one of the por- 80. tions b 6 relative to the ot er causing but a slight locking frictional engagement between 1 the pillars or posts of the nut and the boltthreads, while a greater relative movement of these parts will result in a greater distor- 8 tion of the threads f and. a consequently tighter grip or bind between the nut and the The nut may be distorted, as represented 'n Fig; 3, before it is applied to the bolt, for which purpose specially-devised machinery may be em loyed, or the distortion may. ter the nut .has been applied to the bolt, as indicated in Figs. 1 and 2. W hen the nut is distorted while in place upon the bolt, one of the end sections 6 is enga ed by a suitable holding-wrench "and the other engaged by another wrench. to which suflicient power is applied to cause a yielding and distortion of the connecting parts 0.

Iam aware. that it has heretofore been proposed to produce lock-nuts wherein one end portion wasIturned relative to the other for the pur use of distorting the intermediate or mid 1e portion of the nut; but in such earlier constructions of which I have knowledge it has been impracticable to produce the distortion, and consequently the locking of the nut, after it is ap lied to the, bolt. This I- can accomplish with a nut conz c structed as I have described and illustrated, A It is evident that the size of the connectb of the nut,

ing pillars or posts a may be varied.

' and a plurality of connecting Where I a relatively feeble locking effectonly is required and where after being screwed in place upon the bolt, the pillars will be smaller than Where a more owerful lock is required or where the nuts are distorted by specially-designed machinery before being applied to the bolt.

In order that the pillars may be distorted as described, they should be relatively high, and I have shown them of a height approximately equal to the thickness of the sections these being the preferred relations of the several parts of the nut to each other so far as longitudinal dimensions are concerned.

While I have represented the nut as being formed with but two pillars, I do not wish tobe understood as claiming that my invention. is limited to the use of this particular num-' ber, as more than two can be employed if it be found desirable.

What I claim is-- 1. ,A lock-nut having the end sections b, b internally screw-threaded and the connector posts a c the inner faces of which are screw-threaded, the height of the pillars being approximately equal to the thickness of the sections b 2. A lock-nut comprising end sections b b,

osts or pillars 0, both said sections and the pillars being internally screw-threaded to engage with a bolt, and the cross-sectional area of the ilthe nut is to be distorted being approximately equal connecting pillars or posts screw-threaded and distorted, substantially lars or connecting parts being materially ess than the cross-sectional area of the end sections band I) andthe height of such pillars to the thickness of the. end sections, substantially as set forth. 4o 31 A lock-nut comprising the internallyscrew-threaded end sections 1), b, and the c, the latter being asset forth.

4:. A lock-nut having end sections 1), b, and the connecting posts or pillars c, said parts being internally screw-threaded and the said end parts being turned, about the axis of the nut, relative to each other, whereby the connecting pillars or osts are twisted and distorted, substantia y asset forth.

5. A look-nut comprising en'd sections se arated from each other by spaces e, and t 1e pillars or posts area of the nuts, the said connecting pillars or posts being distorted by a turning of one ofthe end sections of the nut relative to the other, whereby they are caused to en age with and bind upon the screw-threads o the bolt to which the nut may be applied, subs'tantially as set forth. r In testimony whereof I afiix my signature in presence of two witnesses.

PETER E. BAGGE.

Witnesses:

. CARL LARSON, OLOF NELSON.

connecting the end sections of 5 5 the nut and of less sectional area than the 

